﻿/*
    Copyright (C) 2014-2016 de4dot@gmail.com

    This file is part of dnSpy

    dnSpy is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    dnSpy is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with dnSpy.  If not, see <http://www.gnu.org/licenses/>.
*/

using System;
using dnSpy.Contracts.Decompiler;

namespace dnSpy.Documents.Tabs.DocViewer {
	sealed class LazyStructureVisualizerCollection {
		public static readonly LazyStructureVisualizerCollection Empty = new LazyStructureVisualizerCollection();

		public StructureVisualizerCollection Collection {
			get {
				if (coll == null) {
					coll = new StructureVisualizerCollection(ranges);
					ranges = null;
				}
				return coll;
			}
		}
		StructureVisualizerCollection coll;
		CodeBracesRange[] ranges;

		LazyStructureVisualizerCollection() {
			this.coll = StructureVisualizerCollection.Empty;
		}

		public LazyStructureVisualizerCollection(CodeBracesRange[] ranges) {
			if (ranges == null)
				throw new ArgumentNullException(nameof(ranges));
			this.ranges = ranges;
		}
	}
}
